True, the AI mannerisms in LLM generated outputs are the same style of high view YouTube videos or high karma Reddit comments from a decade ago.
But I’ve always hated the YouTube voice or the “hey Reddit, unidan here, as a biologist did you know that jackdaws and crows aren’t the same. Upvotes to left” style.
But that’s explicitly the style that normal people didn’t use and AI almost exclusively uses, so it is noticeable.
The other tell is using an emoji at the start of every demarcated writing section. Such as a quote or markdown heading